Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Analysis of Smooth Geomembrane–Sand Interface
Very limited attention was paid on the micro–response of sand as it interacts with a geomembrane and the effect of surface hardness on the interaction at the microscopic level. In this study, a coupled finite difference–discrete model was adopted with which to analyze the shear behavior of a sand–smooth geomembrane interface. The model was validated using experimental data. The numerical results show that the effects of normal stress and surface hardness on the interface strength depend on the shear mechanism (sliding or plowing) at the interface. There exists a critical normal stress at which the mechanism transforms from predominant sliding to predominant plowing. There is a high level of coupling effect between normal stress and surface hardness on the interface strength. Micro–topographical analysis of geomembrane provides clear insights into the shear mechanism at the interface, supporting the results obtained from interface shear tests. No shear band is formed during shearing for a sand–smooth geomembrane interface. The shear resistance of sand–smooth geomembrane interface relies on interface indentations and characteristics rather than on the formation of a shear band.
Analysis of Smooth Geomembrane–Sand Interface
Very limited attention was paid on the micro–response of sand as it interacts with a geomembrane and the effect of surface hardness on the interaction at the microscopic level. In this study, a coupled finite difference–discrete model was adopted with which to analyze the shear behavior of a sand–smooth geomembrane interface. The model was validated using experimental data. The numerical results show that the effects of normal stress and surface hardness on the interface strength depend on the shear mechanism (sliding or plowing) at the interface. There exists a critical normal stress at which the mechanism transforms from predominant sliding to predominant plowing. There is a high level of coupling effect between normal stress and surface hardness on the interface strength. Micro–topographical analysis of geomembrane provides clear insights into the shear mechanism at the interface, supporting the results obtained from interface shear tests. No shear band is formed during shearing for a sand–smooth geomembrane interface. The shear resistance of sand–smooth geomembrane interface relies on interface indentations and characteristics rather than on the formation of a shear band.
Analysis of Smooth Geomembrane–Sand Interface
Zhou, Wan-Huan (Autor:in) / Yin, Zhen-Yu (Autor:in)
Practice of Discrete Element Method in Soil-Structure Interface Modelling ; Kapitel: 9 ; 213-238
13.08.2022
26 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Interface Frictional Property Between Sand and Geomembrane
| Springer Verlag | 2010
Shear behavior of sand-smooth geomembrane interfaces through micro-topographical analysis
| Online Contents | 2016